Frys usually has them. I also sometimes see them at the big chain hardware department stores like Home Depot.
But what are you using the fan for. Typically the fans don't work as well as one would want. They dry out the models eyes very fast and often give less than controlable results. I have found that the portable leaf blowers are much easier to use and will give you a blast of hair just where you want it.
Cheers,
rfs

Because you are in Poland, I'm not sure if they'll ship overseas, but if you go to Homedepot.com, search under portable fans, you'll find two different models that match your picture. But again, availability will depend on your being able to have it shipped to you. Good luck!